US9126561B2 - Side airbag device for vehicle - Google Patents

Side airbag device for vehicle Download PDF

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Publication number
US9126561B2
US9126561B2 US14/219,602 US201414219602A US9126561B2 US 9126561 B2 US9126561 B2 US 9126561B2 US 201414219602 A US201414219602 A US 201414219602A US 9126561 B2 US9126561 B2 US 9126561B2
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United States
Prior art keywords
bag portion
side airbag
lower bag
vehicle
restricting member
Prior art date
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Expired - Fee Related
Application number
US14/219,602
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English (en)
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US20140284906A1 (en
Inventor
Fumito Akiyama
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Toyota Motor Corp
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Toyota Motor Corp
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Assigned to TOYOTA JIDOSHA KABUSHIKI KAISHA reassignment TOYOTA JIDOSHA KABUSHIKI KAISHA ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: AKIYAMA, FUMITO
Publication of US20140284906A1 publication Critical patent/US20140284906A1/en
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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60R—VEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR
    • B60R21/00—Arrangements or fittings on vehicles for protecting or preventing injuries to occupants or pedestrians in case of accidents or other traffic risks
    • B60R21/02—Occupant safety arrangements or fittings, e.g. crash pads
    • B60R21/16—Inflatable occupant restraints or confinements designed to inflate upon impact or impending impact, e.g. air bags
    • B60R21/23—Inflatable members
    • B60R21/231—Inflatable members characterised by their shape, construction or spatial configuration
    • B60R21/233—Inflatable members characterised by their shape, construction or spatial configuration comprising a plurality of individual compartments; comprising two or more bag-like members, one within the other
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60R—VEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR
    • B60R21/00—Arrangements or fittings on vehicles for protecting or preventing injuries to occupants or pedestrians in case of accidents or other traffic risks
    • B60R21/02—Occupant safety arrangements or fittings, e.g. crash pads
    • B60R21/16—Inflatable occupant restraints or confinements designed to inflate upon impact or impending impact, e.g. air bags
    • B60R21/20—Arrangements for storing inflatable members in their non-use or deflated condition; Arrangement or mounting of air bag modules or components
    • B60R21/207—Arrangements for storing inflatable members in their non-use or deflated condition; Arrangement or mounting of air bag modules or components in vehicle seats
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60R—VEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR
    • B60R21/00—Arrangements or fittings on vehicles for protecting or preventing injuries to occupants or pedestrians in case of accidents or other traffic risks
    • B60R21/02—Occupant safety arrangements or fittings, e.g. crash pads
    • B60R21/16—Inflatable occupant restraints or confinements designed to inflate upon impact or impending impact, e.g. air bags
    • B60R21/23—Inflatable members
    • B60R21/231—Inflatable members characterised by their shape, construction or spatial configuration
    • B60R21/23138—Inflatable members characterised by their shape, construction or spatial configuration specially adapted for side protection
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60R—VEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR
    • B60R21/00—Arrangements or fittings on vehicles for protecting or preventing injuries to occupants or pedestrians in case of accidents or other traffic risks
    • B60R21/02—Occupant safety arrangements or fittings, e.g. crash pads
    • B60R21/16—Inflatable occupant restraints or confinements designed to inflate upon impact or impending impact, e.g. air bags
    • B60R21/23—Inflatable members
    • B60R21/231—Inflatable members characterised by their shape, construction or spatial configuration
    • B60R21/23138—Inflatable members characterised by their shape, construction or spatial configuration specially adapted for side protection
    • B60R2021/23146—Inflatable members characterised by their shape, construction or spatial configuration specially adapted for side protection seat mounted
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60R—VEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR
    • B60R21/00—Arrangements or fittings on vehicles for protecting or preventing injuries to occupants or pedestrians in case of accidents or other traffic risks
    • B60R21/02—Occupant safety arrangements or fittings, e.g. crash pads
    • B60R21/16—Inflatable occupant restraints or confinements designed to inflate upon impact or impending impact, e.g. air bags
    • B60R21/23—Inflatable members
    • B60R21/231—Inflatable members characterised by their shape, construction or spatial configuration
    • B60R21/233—Inflatable members characterised by their shape, construction or spatial configuration comprising a plurality of individual compartments; comprising two or more bag-like members, one within the other
    • B60R2021/23324—Inner walls crating separate compartments, e.g. communicating with vents
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60R—VEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR
    • B60R21/00—Arrangements or fittings on vehicles for protecting or preventing injuries to occupants or pedestrians in case of accidents or other traffic risks
    • B60R21/02—Occupant safety arrangements or fittings, e.g. crash pads
    • B60R21/16—Inflatable occupant restraints or confinements designed to inflate upon impact or impending impact, e.g. air bags
    • B60R21/23—Inflatable members
    • B60R21/231—Inflatable members characterised by their shape, construction or spatial configuration
    • B60R21/2334—Expansion control features
    • B60R21/2338—Tethers
    • B60R2021/23382—Internal tether means

Definitions

  • the invention relates to a side airbag device for a vehicle, which restrains a seated occupant by using a side airbag at the time of a side impact of the vehicle.
  • a gas bag in a gas bag-type side collision protective device described in Japanese Patent Application Publication No. 2000-177527 A (JP 2000-177527 A), includes a chamber for thorax (an upper bag portion) that expands to a side of a thorax of an occupant, and a chamber for pelvis (a lower bag portion) that expands to a side of a pelvis of the occupant. It is possible to fill these chambers with gas by using a source of compressed gas so that the chambers in a filled state have different inner pressure from each other. For example, by reducing the inner pressure of the chamber for thorax so as to be smaller than the inner pressure of the chamber for pelvis, the thorax region, which is relatively vulnerable to an impact, is cushioned more softly than the pelvis.
  • a side airbag is compressed between a seated occupant and a side door as the side door intrudes into a vehicle interior side due to a force of a side impact.
  • the chamber for thorax and the chamber for pelvis are compressed into an oblong flat shape (an elliptical shape) when seen from a vehicle front-rear direction, and the dimension of each of the chambers in an upper-lower direction is increased.
  • the high-pressure chamber for pelvis enters an abdominal region that has lower load resistance than the pelvis region, and a load on the abdominal region can increase.
  • the present invention provides a side airbag device for a vehicle, which is able to inhibit an increase in load on an abdominal region of a seated occupant due to a load from a lower bag portion that restrains a lumbar region of the seated occupant.
  • a first aspect of the present invention relates to a side airbag device for a vehicle.
  • the side airbag device for vehicle includes an inflator, which is provided in a side portion of a seat back of a vehicle seat on an outer side in a vehicle width direction, and is operated and generates gas when a side impact of the vehicle is detected or predicted, a side airbag, which is provided on the side portion, partitioned into upper and lower bag portions, and expanded and deployed as gas from the inflator is distributed into the respective bag portions so that inner pressure of the lower bag portion becomes higher than inner pressure of the upper bag portion, the upper bag portion restraining a shoulder region to an abdominal region of a seated occupant, and the lower bag portion restraining a lumber region of the seated occupant, and a restricting member, which is bridged between both upper and lower end portions of the lower bag portion, and restricts a dimension of the lower bag portion in an upper-lower direction within a range that is previously set, in a state where the side airbag is expanded and
  • the inflator is operated and gas is generated. Then, gas is distributed into the upper and lower bag portions of the side airbag, and the side airbag is expanded and deployed.
  • the inner pressure of the lower bag portion that restrains the lumber region of the seated occupant becomes higher than the inner pressure of the upper bag portion that restrains the shoulder region to the abdominal region of the seated occupant.
  • the dimension of the lower bag portion in the upper-lower direction is restricted within a previously-set range by the restricting member that is bridged between both upper and lower end portions of the lower bag portion.
  • the side airbag device for a vehicle it is possible to inhibit a load on the abdominal region of the seated occupant from increasing due to a load from the lower bag portion that restrains the lumbar region of the seated occupant.
  • FIG. 1 is a schematic side view of a vehicle seat in which a side airbag device for a vehicle according to an embodiment of the present invention is installed, and is a view showing a expanded and deployed state of a side airbag;
  • FIG. 2 is a partial sectional view showing the expanded and deployed state of the side airbag for a vehicle according to the embodiment of the present invention, and a peripheral structure of the side airbag seen from a front side of the vehicle;
  • FIG. 3A is an enlarged sectional view showing an enlarged part of FIG. 2 ;
  • FIG. 3B is a sectional view corresponding to FIG. 3A , showing a state where the side airbag is compressed by a load in a vehicle width direction;
  • FIG. 4A is a partial sectional view corresponding to FIG. 2 , showing an comparative example of the embodiment
  • FIG. 4B is a sectional view corresponding to FIG. 4A , showing a state where the side airbag according to the comparative example is compressed by a load in the vehicle width direction;
  • FIG. 5 is a developed plan view showing a first modified example of a strap according to the embodiment of the present invention.
  • FIG. 6 is a developed plan view showing a second modified example of the strap according to the embodiment of the present invention.
  • FIG. 7 is a developed plan view showing a third modified example of the strap according to the embodiment of the present invention.
  • a side airbag device 10 for a vehicle will be explained based on FIG. 1 to FIG. 4B .
  • An arrow FR, an arrow UP, and an arrow OUT shown in the drawings as necessary indicate a front direction (an advancing direction) of a vehicle, an upper direction, and an outer side in a vehicle width direction, respectively.
  • a front direction an advancing direction
  • an upper direction an outer side in a vehicle width direction
  • explanation is given by simply using a front-rear direction and an upper-lower direction, front and rear in a vehicle front-rear direction, and upper and lower sides in a vehicle upper-lower direction are indicated, unless otherwise specified.
  • the side airbag device 10 is installed in a side portion on a door side 14 A in a seat back 14 of a vehicle seat 12 (the side portion on an outer side in a vehicle width direction: the side portion on a side of a side door 54 shown in FIG. 2 ).
  • This seat back 14 is connected to a rear end portion of the seat cushion 16 so that the seat back 14 is able to be reclined.
  • a head rest 18 is connected to an upper end portion of the seat back 14 .
  • a front-rear direction, a left-right direction (a width direction), and an upper-lower direction of the vehicle seat 12 coincide with the front-rear direction, a left-right direction (a width direction), and the upper-lower direction of the vehicle, respectively.
  • a crash test dummy P is seated in the vehicle seat 12 instead of an actual occupant.
  • the dummy P is, for example, AM50 (a model of a 50th percentile American adult male occupant) of WorldSID (World Side Impact Dummy).
  • WorldSID World Side Impact Dummy
  • the side airbag device 10 is structured by main parts that are a side airbag 20 , an inflator 22 (a gas generating unit) that generates gas inside the side airbag 20 , and a strap 24 (a restricting member) arranged inside the side airbag 20 .
  • the side airbag 20 is folded and arranged (stored) inside the side portion on the door side 14 A in a unitized (modularized) state together with the inflator 22 and so on, and is expanded and deployed between seated occupant P and a door trim 56 (see FIG. 2 ) of the side door 54 by pressure of gas that is generated from the inflator 22 .
  • a pad material and a skin material both not shown
  • the seat back 14 are broken as the pad material and the skin material receive expansion pressure of the side airbag 20 .
  • Front-rear and upper-lower directions of the side airbag 20 described in the explanation below indicate directions in a state where the side airbag 20 is expanded and deployed, unless otherwise specified, and generally coincide with front-rear and upper-lower directions of the seat back 14 .
  • the side airbag 20 is a two-chambered side airbag having upper and lower chambers, and, formed into a bag shape by, for example, sewing one piece of base fabric 26 that is formed by being cut out from a nylon or polyester fabric material.
  • the base fabric 26 is folded in half along a folding line K that is located on a rear end edge of the side airbag 20 .
  • a one side portion 26 A and the other side portion 26 B of the base fabric 26 which are divided through the folding line K, are superimposed onto each other, and peripheral edge portions of the one side portion 26 A and the other side portion 26 B are sewn at a periphery sewing portion T 1 (see FIG. 3A and FIG. 3B ; not shown in FIG. 1 and FIG. 2 ).
  • the side airbag 20 having a bag shape may be formed by superimposing two pieces of base fabric and sewing peripheral edge portions of the two pieces of base fabric.
  • the side airbag 20 is arranged so that the one side portion 26 A of the base fabric 26 faces an inner side in the vehicle width direction (the seated occupant P side), and the other side portion 26 B of the base fabric 26 faces an outer side in the vehicle width direction (the side door 54 side) in the state where the side airbag 20 is expanded and deployed.
  • the side airbag 20 is formed so as to have a generally long elliptical shape along a height direction of the seat back in a side view of the side airbag 20 in the expanded and deployed state, and the side airbag 20 is formed to be large enough to restrain a shoulder region S, a chest region C, an abdominal region B, and a lumbar region L of the seated occupant P. As shown in FIG.
  • a lower end portion of the side airbag 20 is arranged so as to abut on or come close to an upper surface of a side support portion 16 A of the seat cushion 16 on the side door 54 side.
  • the inside of the side airbag 20 is partitioned by a tether 28 (a partitioning fabric: a partition wall) serving as a partitioning portion.
  • a tether 28 (a partitioning fabric: a partition wall) serving as a partitioning portion.
  • Two pieces of base fabric 30 , 32 are formed into a long belt shape from a fabric material similar to that of the base fabric 26 , and edge portions of long sides of the two pieces of base fabric 30 , 32 are sewn at a sewing portion T 2 , thereby forming the tether 28 .
  • the tether 28 is formed into a long belt shape as a whole.
  • One of edge portions of long sides of the tether 28 is sewn to the one side portion 26 A of the base fabric 26 at a sewing portion T 3
  • the other edge portion of a long side of the tether 28 is sewn to the other side portion 26 B of the base fabric 26 at a sewing portion T 4 .
  • the tether 28 is arranged so as to extend along the vehicle front-rear direction at a height of a boundary between the abdominal region B and the lumbar region L of the seated occupant P (see the alternate long and short dash line E shown in FIG. 2 : hereinafter, referred to as a “boundary E”).
  • the side airbag 20 is partitioned by the tether 28 into an upper bag portion 36 and a lower bag portion 38 .
  • the inside of the upper bag portion 36 is referred to as an upper chamber 40
  • the inside of the lower bag portion 38 is referred to as a lower chamber 42 .
  • a volume of the upper chamber 40 is set to be sufficiently larger than a volume of the lower chamber 42 .
  • the height of the foregoing boundary E is a height of an upper end of the pelvis.
  • the inflator 22 is a cylinder-type inflator, and is formed into a cylindrical shape.
  • the inflator 22 is arranged inside the upper bag portion 36 in a state where an axis direction of the inflator 22 is along a height direction of the seat back 14 .
  • the inflator 22 is arranged so as to be located on a lower side of a rear end portion of the upper bag portion 36 .
  • a pair of upper and lower stud bolts projects from a peripheral portion of the inflator 22 towards an inner side in the vehicle width direction.
  • the stud bolts pass through the one side portion 26 A of the base fabric 26 , and a side frame 15 A of a seatback frame 15 , and nuts (not shown) are screwed to distal end sides of the stud bolts. Therefore, the inflator 22 is fastened and fixed to the side frame 15 A (so-called side face fastening) together with the side airbag 20 .
  • the stud bolts which project to the vehicle rear side from the peripheral portion of the inflator 22 , may pass though a bracket or the like, which is fixed to the side frame 15 A, from the vehicle front side, and be screwed to nuts (so-called back face fastening).
  • a gas ejecting portion 22 A is provided, and gas is ejected from the gas ejecting portion 22 A when the inflator 22 is operated.
  • a side impact ECU 46 installed in a vehicle is electrically connected to the inflator 22 .
  • a side impact sensor 48 which detects a side impact, is electrically connected to the side impact ECU 46 .
  • the side impact ECU 46 is structured so as to operate the inflator 22 when a side impact (or an unavoidable side impact) is detected based on a signal from the side impact sensor 48 .
  • the inflator 22 may be operated when the side impact ECU 46 predicts a side impact based on a signal from the precrash sensor.
  • the above-mentioned inflator 22 is covered by an inner tube 50 (a flow straightener fabric) that is a constituent of the side airbag 20 .
  • the inner tube 50 is sewn into a tubular shape from a fabric material similar to that of the base fabric 26 of the side airbag 20 , and the inflator 22 is inserted in an inner side of the inner tube 50 .
  • the pair of upper and lower stud bolts of the inflator 22 passes through the inner tube 50 , and is sandwiched between the inflator 22 and the one side portion 26 A of the base fabric 26 .
  • the inside of the inner tube 50 is communicated with the inside of the upper bag portion 36 through an upper end opening 50 A of the inner tube 50 , which is located in an upper part of the upper bag portion 36 .
  • the sewing portion T 2 stated above is not set, and, the lower end side of the inner tube 50 , which is inserted between the pieces of base fabric 30 , 32 , is sewn to the pieces of base portions or base fabric 30 , 32 at a sewing portion (not shown).
  • a lower end portion of the inner tube 50 projects inside the lower bag portion 38 , and the inside of the inner tube 50 is communicated with the inside of the lower bag portion 38 through a lower end opening 50 B of the inner tube 50 , which is located inside the lower bag portion 38 .
  • the inner tube 50 has a function to straighten a flow of gas ejected from the inflator 22 .
  • Gas ejected from the inflator 22 is ejected from the upper end opening 50 A of the inner tube 50 towards the upper part of the inside of the upper bag portion 36 , and also ejected from the lower end opening 50 B of the inner tube 50 towards the inside of the lower bag portion 38 .
  • the side airbag 20 is expanded and deployed.
  • it is set that the same amount of gas is ejected from the upper end opening 50 A and the lower end opening 50 B.
  • inner pressure of the lower bag portion 38 which has a smaller volume than that of the upper bag portion 36 , becomes higher than inner pressure of the upper bag portion 36 .
  • the lower end portion of the inner tube 50 which projects into the lower bag portion 38 , structures a check valve 52 . Once the inner pressure of the lower bag portion 38 reaches a preset value or above, the check valve 52 is crushed and blocked. Thus, a flow of gas from the inside of the lower bag portion 38 to the inside of the upper bag portion 36 (a reverse flow) is limited, and high inner pressure of the lower bag portion 38 is maintained for a long period of time.
  • a strap 24 which serves as a restricting member, is arranged inside the lower bag portion 38 .
  • the strap 24 is formed into a long belt shape from a fabric material similar to (here, the same as) that of the base fabric 26 of the side airbag 20 , in other words, a flexible sheet-shaped material, and is hard to be stretched.
  • One end portion of the strap 24 in a longitudinal direction is sewn to a center portion of the tether 28 in a longitudinal direction, and also a center portion of the tether 28 in a width direction. To be specific, as shown in FIG.
  • the one end portion of the strap 24 in the longitudinal direction is sandwiched between the pieces of base fabric 30 , 32 that structure the tether 28 , and, the pieces of base fabric 30 , 32 and the one end portion of the strap 24 in the longitudinal direction are sewn together at the sewing portion T 2 .
  • the other end portion of the strap 24 in the longitudinal direction is sewn to a center portion of a lower end edge portion of the side airbag 20 in the front-rear direction.
  • the other end portion of the strap 24 in the longitudinal direction is sandwiched between the one side portion 26 A and the other side portion 26 B of the base fabric 26 , and, the one side portion 26 A, the other side portion 26 B, and the other end portion of the strap 24 in the longitudinal direction are sewn together at the periphery sewing portion T 1 .
  • the strap 24 is bridged between both upper and lower end portions of the lower bag portion 38 .
  • a length dimension of the strap 24 is set so that the strap 24 is stretched between both upper and lower end portions of the lower bag portion 38 in the state where the side airbag 20 is expanded and deployed, and a dimension of the lower bag portion 38 in the upper-lower direction is thus regulated within a range that is previously set, in the state where the side airbag 20 is expanded and deployed.
  • the strap 24 is arranged in a posture where a thickness direction of the strap 24 is along the vehicle width direction, so that the strap 24 is located in the center of the inside of the lower bag portion 38 in the vehicle front-rear direction, and in the center of the inside of the lower bag portion 38 in the vehicle width direction.
  • the position where the strap 24 is arranged is set on the vehicle front side of the lower end opening 50 B (a gas supply port into the lower bag portion 38 ) of the inner tube 50 , and gas ejected from the lower end opening 50 B to a rear part of the inside of the lower bag portion 38 travels through both sides of the strap 24 in the thickness direction of the strap 24 , and then is flown to a front part of the inside of the lower bag portion 38 .
  • the position where the strap 24 is arranged is a position that faces a center portion of a side surface of the lumbar region L of the seated occupant P in the front-rear direction, and, the position of the strap 24 faces the lumbar region L in the vehicle width direction.
  • the inflator 22 is operated by the side impact ECU 46 . Then, gas ejected from the inflator 22 is ejected to the upper part of the inside of the upper bag portion 36 from the upper end opening 50 A of the inner tube 50 , and is also ejected to the inside of the lower bag portion 38 from the lower end opening 50 B of the inner tube 50 .
  • the side airbag 20 is expanded and deployed between the seated occupant P and the door trim 56 , the shoulder region S through the abdominal region B of the seated occupant P is restrained by the upper bag portion 36 , and the lumbar region L of the seated occupant P is restrained by the lower bag portion 38 .
  • the inner pressure of the lower bag portion 38 becomes higher than the inner pressure of the upper bag portion 36 . Therefore, the lumbar region L having relatively high load resistance is restrained effectively by the high-pressure lower bag portion 38 , and the chest region C and the abdominal region B having relatively low load resistance are restrained softly by the low-pressure upper bag portion 36 .
  • the dimension of the lower bag portion 38 in the upper-lower direction is restricted within a previously set range by the strap 24 that is bridged between both upper and lower end portions of the lower bag portion 38 , in the state where the side airbag 20 is expanded and deployed. This makes it possible to inhibit the high-pressure lower bag portion 38 from carelessly entering into the abdominal region B side when the side airbag 20 is compressed between the seated occupant P and the door trim 56 due to a force of a side impact.
  • sectional shapes of an upper bag portion 36 ′ and the lower bag portion 38 ′ become oblong flat shapes (elliptical shapes) when seen in the vehicle front-rear direction, as the side airbag 20 ′ is compressed between a seated occupant P and a door trim 56 .
  • the high-pressure lower bag portion 38 ′ enters a side of an abdominal region B with low load resistance, and a load on the abdominal region B can be increased.
  • the check valve 52 limits (or completely blocks) a reverse flow of the gas from the lower bag portion 38 to the upper bag portion 36 .
  • the check valve 52 limits (or completely blocks) a reverse flow of the gas from the lower bag portion 38 to the upper bag portion 36 .
  • the one end portion of the strap 24 in the longitudinal direction is sewn to the tether 28 , and, at the same time, the other end portion of the strap 24 in the longitudinal direction is sewn to the periphery sewing portion T 1 of the side airbag 20 .
  • the periphery sewing portion T 1 it is possible to attach the strap 24 to the side airbag 20 with a simple structure.
  • the strap 24 in the state where the side airbag 20 is expanded and deployed, is arranged so as to be located in the center of the inside of the lower bag portion 38 in the vehicle front-rear direction, and also in the center of the inside of the lower bag portion 38 in the vehicle width direction.
  • the position where the strap 24 is arranged is a position that faces the center portion of the side surface of the lumbar region L of the seated occupant P in the front-rear direction, and, the position of the strap 24 faces the lumbar region L in the vehicle width direction.
  • the dimension of the lower bag portion 38 in the upper-lower direction is restricted by the strap 24 , and it is thus possible to make it difficult for a load from the lower bag portion 38 to be inputted into the center portion of the side surface of the abdominal region B in the front-rear direction (in other words, a portion projecting most outwardly in the vehicle width direction).
  • the strap 24 is arranged as stated above, it is possible to inhibit the strap 24 from interfering a flow of gas supplied into the lower bag portion 38 from the lower end opening 50 B of the inner tube 50 . Since it is possible to supply gas to a front portion side of the lower bag portion 38 at an early stage, deployment performance of the lower bag portion 38 into a small gap between the lumbar region L of the seated occupant P and the door trim 56 is improved.
  • the strap 24 serving as the restricting member is formed from a fabric material that is a flexible sheet-shaped material. Therefore, when folding the side airbag 20 , it is possible to fold the strap 24 together. Therefore, the strap 24 does not become an obstacle during the folding.
  • the strap 24 is formed from the same fabric material as that of the base fabric 26 of the side airbag 20 , it is possible to reduce costs for the strap 24 .
  • the sheet-shaped strap 24 is in a posture in which the thickness direction of the strap 24 is along the vehicle width direction.
  • the side airbag 20 is partitioned by the tether 28 into the upper bag portion 36 and the lower bag portion 38 , it is possible to increase an expansion thickness of the upper bag portion 36 and the lower bag portion 38 (dimensions in the vehicle width direction in the state where the side airbag 20 is expanded and deployed) only by a width dimension of the tether 28 .
  • energy absorption strokes of the upper bag portion 36 and the lower bag portion 38 are ensured well.
  • the strap 24 is formed into a long belt shape.
  • the present invention is not limited to this, and the shape of the strap (the restricting member) may be changed as necessary.
  • the strap 60 may be formed so that both end portions of the strap 60 in a longitudinal direction are wide, and a middle portion of the strap in the longitudinal direction is narrow.
  • an increase in the dimension of the lower bag portion 38 in the upper-lower direction is restricted within a broad range in the vehicle front-rear direction, while inhibiting interference with a flow of gas inside the lower bag portion 38 .
  • the strap may be formed so that a width dimension of the strap 62 is gradually decreased from one end portion of the strap 62 in a longitudinal direction, which is sewn to the tether 28 , towards the other end portion of the strap 62 in the longitudinal direction, which is sewn to a peripheral edge portion of the side airbag 20 .
  • one piece of the strap 24 is provided inside the lower bag portion 38 .
  • the present invention is not limited to this, and, as shown in FIG. 7 , a plurality of (here, two pieces of) straps 64 , 66 aligned in the vehicle front-rear direction in the state where the side airbag 20 is expanded and deployed, may be provided inside the lower bag portion 38 .
  • this structure it is also possible to restrict an increase in the dimension of the lower bag portion 38 in the upper-lower direction in a broad-range in the vehicle front-rear direction.
  • the strap 24 serving as the restricting member is formed from a flexible sheet-shaped material.
  • the present invention is not limited to this, and a material for the restricting member may be changed as appropriate.
  • the restricting member may be formed from a reticular material.
  • the lower end portion of the inner tube 50 works as the check valve 52 .
  • the check valve may be formed by the base fabric 26 of the side airbag 20 or the tether 28 .
  • One or both of the inner tube (the flow straightener fabric) and the check valve may be omitted.
  • the side airbag 20 is partitioned into two bag portions that are the upper bag portion 36 and the lower bag portion 38 .
  • the present invention is not limited to this, and the side airbag may be partitioned into three bag portions or more.
  • the upper bag portion 36 may be partitioned into a front part and a rear part, or the upper bag portion 36 may be partitioned into an upper part and a lower part.
  • the other end portion of the strap 24 in the longitudinal direction is sewn to the base fabric 26 of the side airbag 20 at the periphery sewing portion Ti.
  • the present invention is not limited to this, and the other end portion of the strap 24 in the longitudinal direction may be sewn to the base fabric 26 of the side airbag 20 at a sewing portion other than the periphery sewing portion T 1 .
  • the side airbag 20 is partitioned by the tether 28 (the partitioning fabric: the partition wall) into the upper bag portion 36 and the lower bag portion 38 .
  • the present invention is not limited to this, and, the side airbag 20 may be partitioned into the upper bag portion 36 and the lower bag portion 38 by a sewing portion (a seam) where the one side portion 26 A and the other side portion 26 B of the base fabric 26 are sewn along the front-rear direction of the side airbag 20 .
  • one end portion of the strap 24 in the longitudinal direction may be sewn together to the sewing portion (a partitioning portion) between the upper bag portion 36 and the lower bag portion 38 .

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Air Bags (AREA)
US14/219,602 2013-03-22 2014-03-19 Side airbag device for vehicle Expired - Fee Related US9126561B2 (en)

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JP2013060915A JP2014184852A (ja) 2013-03-22 2013-03-22 車両用サイドエアバッグ装置

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JP6304020B2 (ja) * 2014-12-24 2018-04-04 豊田合成株式会社 サイドエアバッグ装置
JP2016185770A (ja) * 2015-03-27 2016-10-27 豊田合成株式会社 サイドエアバッグ装置
KR101866083B1 (ko) * 2016-11-01 2018-06-11 현대자동차주식회사 자립형 센터 사이드 에어백
KR102530685B1 (ko) 2017-08-18 2023-05-11 현대자동차주식회사 차량용 에어백
KR102452467B1 (ko) 2017-08-24 2022-10-11 현대자동차주식회사 차량용 에어백
KR102399622B1 (ko) 2017-08-24 2022-05-17 현대자동차주식회사 차량의 사이드 에어백 장치
KR102565349B1 (ko) 2018-03-19 2023-08-14 현대자동차주식회사 차량용 에어백
CN112912284B (zh) * 2018-11-30 2023-06-30 奥托立夫开发公司 侧面安全气囊装置
JP7142061B2 (ja) * 2019-10-17 2022-09-26 オートリブ ディベロップメント エービー サイドエアバッグ装置
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